'Unlimited Credits' Buy

Just picked the game up yesterday and experienced a bug which I can't see mentioned elsewhere.

Was in the store purchasing blue prints and found if I right click to buy then right click to sell back and keep repeating on the same item my credits continue to increase and after 10 purchase, sale, rebuy, sale had made 20,000 credits.

EXTRA - Have just retried this on purple items where fate points are used and these can also be generated unlimited by purchasing, selling, re-buying, selling etc.